Once in the "Manage Group Users" area, you should see the users table shown below:

First, select the gear icon in the "Actions" column, then select the "View or Edit" option.

You should then see a new panel with activity and permissions details for the selected user.

The default view is for the user's permissions. Select the "Activity" option to view a list of the user's saved changes in the ATLAS Financial Commitments applications.

If you made any changes to the permissions when viewing, you'll need to select the "Update" option for those to be finalized. Otherwise, select "Cancel" to back out of the user details panel after viewing the activity.